I put this video together a long time ago- it started, in fact, as a Powerpoint demonstration back when I was with EP Levine, in Boston.

Wait... it actually started when I simply was trying to get my head around exactly how a multi-shot works, now that I'm thinking about it. I used the Powerpoint to bypass having to figure out the math!

If you're really interested in understanding exactly how much better a multishot capture is than a single shot, even from the same sensor, I'd say there's simply nothing like a side-by side comparison to show it. I may, pretty soon, be able to post that... check for an update.

Edit: I have tried it again and it works. (better download speed for some reason).

Does Bayer interpolation simply add the values of the four sencels that make up each genuine pixel? I thought it was more clever than that, and gave you a greater pixel count than the actual number of genuine pixels?

The video implies that the dimensions of the sensitive area of each sencel is equal to the sensel pitch, which would, to some extent make nonsense of 16 shot.

While the 4 shot is very intuitive, the way you've presented the 16-shot version makes me think that there must be matrix maths involved in disentangling overlapping colours. But perhaps they use a similar technique to astronomical "drizzle" software, which attributes all the flux in each "fat" native pixel to the centre of a smaller virtual pixel, and thus can eliminate the overlaps.